/Engine/Source/Runtime/Engine/Classes/Animation/BlendProfile.h
IInterpolationIndexProvider.
virtual int32 GetPerBoneInterpolationIndex ( const [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex) & InCompactPoseBoneIndex, const [FBoneContainer](API\Runtime\Engine\FBoneContainer) & BoneContainer, const [IInterpolationIndexProvider::FPerBoneInterpolationData](API\Runtime\Engine\IInterpolationIndexProvider\FPerBoneInterpolationData) * Data ) const